Tech. Sgt. Tyler Adams, 36th Mobility Response Squadron Engineer, demonstrates for General Norton A. Schwartz, chief of staff of the Air Force, the functions of a Dynamic Cone Penetrometer to measure runway fitness for aircraft landing at Andersen Air Force Base, Guam. As part of the general's May 9 visit, he toured the Pacific Regional Training Center at Northwest Field. The visit marked General Schwartz?s first trip to Andersen AFB since his appointment as the Air Force chief of staff. (U.S. Air Force photo/Airman 1st Class Courtney Witt)